Trail Races & Ultramarathons in Idaho
As of October 6, 2026, Crewable lists 12 upcoming trail races and ultramarathons in Idaho from October 2026 to August 2027. The next is Sasquatch Shuffle on October 10 in McCall. Registration is open for 3.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
October 2026
4 racesHaunted Half Marathon and 5k by Run the Undergrad
Rexburg, IDHalf Marathon5KOpen until Oct 24from $10
November 2026
3 racesApril 2027
1 raceMay 2027
1 raceJune 2027
1 raceJuly 2027
1 raceAugust 2027
1 raceQuick answers
What is the next trail race or ultramarathon in Idaho?
Sasquatch Shuffle, on Saturday, October 10, 2026, in McCall. Distances: 50K, 30K, 20K.
How many trail races and ultramarathons in Idaho have open registration?
3 of the 12 list registration as open as of October 6, 2026, including Sasquatch Shuffle, Haunted Half Marathon and 5k by Run the Undergrad and Fall Creek Beast.
How many of the trail races in Idaho are ultramarathons?
8 of the 12 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 4 are shorter races.
What is the busiest month for trail races and ultramarathons in Idaho?
October 2026, with 4 of the 12. November 2026 follows with 3.
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